Sökning: "realistic channel modeling"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden realistic channel modeling.

1. 1. Measurement Based Channel Characterization and Modeling for Vehicle-to-Vehicle Communications

   Författare :Taimoor Abbas; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vehicle-to-vehicle communications; IEEE 802.11p; Channel measurements; Channel modeling; propagation modeling; MIMO; intelligent transportation systems;

   Sammanfattning : Vehicle-to-Vehicle (V2V) communication is a challenging but fast growing technology that has potential to enhance traffic safety and efficiency. It can also provide environmental benefits in terms of reduced fuel consumption. LÄS MER

3. 2. Multiple Antenna Terminals in Realistic Environments - A Composite Channel Modeling Approach

   Författare :Fredrik Harrysson; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Channel model; MIMO; multiple antennas terminal; propagation; user interaction; vehicular channel; diversity; spatial multiplexing; channel measurement;

   Sammanfattning : For evaluation of specific antenna arrangements in wireless communication systems we need physical channel models that take into account also the directional domain of the propagation channel. In this thesis we investigate, validate and propose a practical approach to wireless channel modeling and, particularly, to mobile communication systems. LÄS MER

4. 3. Modeling multiple antenna systems in realistic environments - a composite channel approach

   Författare :Fredrik Harrysson; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : For evaluation of specific antenna arrangements in wireless communication systems we need physical channel models that take into account the directional domain. Here we propose a practical approach to wireless channel modeling in, particularly, mobile communication systems, by using an assumption that the channel can be divided into separate parts or regions that can be treated and modeled individually. LÄS MER

5. 4. Modeling of a Retrodirective Channel With Active Antenna Arrays for Cross-Eye Jamming

   Författare :Björn Petersson; Martin Norgren; Warren P. du Plessis; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electronic warfare; antenna array; antenna system; radar countermeasures; jamming; cross-eye; systems modeling; system performance; systems simulation; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Cross-Eye (CE) jamming is a technique aimed at inducing false target angles in radar measurements. The potential to deceive monopulse radar, a radar type commonly used due to its angular accuracy and resilience against jamming, has captured the interest of Electronic Warfare (EW) system manufacturers. LÄS MER

7. 5. Verification of wireless communication performance and robustness for automotive applications

   Författare :Mikael Nilsson; Kommunikationsteknologi; []
   Nyckelord :Vehicle-to-Vehicle; V2V; channel modeling; path loss; two-ray; obstruction; large scale fading; shadow fading; multiple links; diversity; correlation; over-the-air; OTA; multi-probe; multipath propagation simulator; fading emulation;

   Sammanfattning : Today's test methods used for verifying the performance and robustness of automotive applications using wireless communication are often based on fieldtrails, which are time consuming, costly, and not repeatable. Therefore, there is an urgent need for new verification methods that can be performed in lab environment, where the realistic radio propagation environment can be emulated. LÄS MER